When to plant in San Ramon, CA

Planting dates worked out from San Ramon's own frost records, not a generic zone chart.

Safe to plant out

Apr 3

1 year in 10 has a later frost

Average last frost

Feb 18

about a 50% chance of a later one

Average first fall frost

Dec 2

1 year in 10 by Nov 16

Frost-free days

280

median, 1991–2020

Station used: Livermore Muni Ap · 17.3 km away · station 120 m, town 148 m. How we match towns to stations

This season

Plan your garden.

Crop	Start indoors	Plant out or sow	Harvest from
Tomato	Feb 6 – Feb 20	Apr 3 – Apr 17	May 28
Sweet pepper	Jan 23 – Feb 6	Apr 3 – Apr 17	Jun 2
Lettuce (leaf)	Dec 17 – Dec 24	Jan 21 – Feb 4	Mar 2
Peas	—	Jan 7 – Feb 4	Mar 3
Bush beans	—	Mar 27 – Apr 17	May 16
Carrot	—	Jan 28 – Mar 11	Mar 29
Beet	—	Jan 21 – Mar 4	Mar 12
Potato	—	Jan 28 – Feb 18	Apr 8
Kale	Dec 10 – Dec 24	Jan 21 – Feb 4	Mar 5
Broccoli	Dec 10 – Dec 24	Jan 21 – Feb 11	Mar 22
Cucumber	Mar 6 – Mar 13	Apr 3 – Apr 17	May 23
Summer squash and zucchini	Mar 6 – Mar 13	Apr 3 – Apr 17	May 18
Winter squash	Mar 6 – Mar 13	Apr 3 – Apr 17	Jun 22
Sweet corn	—	Mar 27 – Apr 17	May 26
Onion (from sets)	—	Jan 21 – Feb 11	Apr 21
Garlic	—	Nov 18 – Dec 16 (fall)	following summer
Spinach	—	Jan 7 – Feb 4	Feb 14
Basil	Feb 20 – Mar 6	Apr 3 – Apr 17	May 30

How the growing season has shifted here, year by year, from the station's own records.

Each year's last spring frostLong-term trend

See the data as a table

Each year's frost-free daysLong-term trend

See the data as a table

Each year's average temperature, April to SeptemberLong-term trend

See the data as a table

What this means for you: This station's record is too short to show a reliable trend yet.

Source: daily records from Livermore Muni Ap (NOAA GHCN-Daily). Years with too many missing days are left out.